grammatical number - Is It is you who are mistaken! correct . . . You are mistaken by the Clefting process, which extracts the focussed NP (you) to be the predicate of a dummy clause with It subject and some form of be as verb (generating It is you in this case), and then making the non-focussed rest of the original sentence into a relative clause modifying the focus NP (generating who are mistaken in this case)
Whats the difference between erroneous and wrong? It means incorrect or mistaken He made the erroneous assumption that the world was flat 'Wrong' can be used in those situations too: He's wrong about how much water will fit in that cup But it has broader meaning to include things that are morally or ethically wrong, unfair, or unjust Shoplifting is the wrong thing to do
Dont mistake me - English Language Usage Stack Exchange Many times during conversation I hear the phrase Don't mistake me Is it grammatically correct when used to mean Don't take negative connotation of my word Shouldn't they say Don't take me by mist
What is the formal way of saying You have got something wrong? 0 Courtesy demands that you never state that someone got something wrong You must instead point out what is right, without accusing him of having been mistaken, let alone that they have done anything wrong, which is even worse
grammaticality - Whats the error in Either he or I is right . . . Actually, I believe you have answered your own question when you ask "Am I right?" The verb "to be" is is very irregular Your query is an excellent example of how tough it can be I am afraid that to be grammatically correct you are stuck with separating the two subjects he and I and treat them according to normal rules: "Either he is right or I am" or "Either I'm right or he is"
word usage - Isnt to be mistaken ambiguous? - English Language . . . On the other hand, if you find am mistaken with a prepositional phrase with for, it must be a passive form, and you must analyze the sentence by the pattern of 2a or 2b, depending on whether the agent is identified in a prepositional phrase with by